Obliquely and symmetrically distributed underwater propeller

Abstract

The invention relates to the technical field of underwater power equipment, in particular to an obliquely and symmetrically distributed underwater propeller which adopts a group of driving assemblies which are obliquely and symmetrically arranged based on the center line of a shell, and the horizontal deflection angles of the two driving assemblies are 8.5 degrees. Comprising a driving motor, a bearing, a bearing oil seal, a bearing seat, a rotating shaft, a rotating shaft oil seal, a gasket and propeller blades, when the water flow is disordered and a leftward or rightward water flow impact resultant force exists in a horizontal plane determined by a connecting line of the driving motors and the propeller blades, a resultant force which is equal to the current water flow impact resultant force in magnitude and opposite to the current water flow impact resultant force in direction is generated in the plane by changing the differential speed of the two driving motors; and the interference of the water flow impact resultant force on the underwater propeller is counteracted. According to the underwater propeller, the static and dynamic underwater stability of the underwater vehicle can be greatly improved, the good anti-interference capability is achieved, meanwhile, the structural arrangement is compact, and the size of the underwater vehicle can be greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater power equipment, and in particular to an underwater propeller with oblique symmetrical distribution. Background Art

[0002] An unmanned underwater vehicle (UUV) is a robot that can autonomously perform tasks underwater. They are usually designed for tasks such as ocean exploration, underwater exploration, seabed research, marine resource development, submarine oil and gas pipeline maintenance, and marine environmental monitoring. With the advancement of science and technology, human exploration of the ocean has become more and more extensive. Since the 20th century, underwater unmanned underwater vehicle technology has attracted the attention and research and development of countries around the world due to its diverse functions and its ability to serve as an underwater carrier platform.

[0003] The underwater environment is complex. When a submersible is sailing, it not only needs to generate power in the forward direction of the submersible, but also needs to resist the impact of water flow from various directions at all times. Otherwise, the submersible will not be able to navigate along the target trajectory. Therefore, it is very necessary to develop an underwater propeller with a simple structure that can resist underwater turbulence. Summary of the invention

[0004] In order to solve the above problems, the present invention provides an underwater thruster with oblique symmetrical distribution, which can greatly improve the static and dynamic underwater stability of the underwater submersible and has good anti-interference ability.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] An underwater thruster with oblique symmetric distribution includes a shell and a group of drive components installed in the shell, wherein the two drive components are installed obliquely symmetrically based on the center line of the shell. Preferably, the two drive components are symmetrically arranged inwardly tilted based on the center line of the shell, and the horizontal deflection angle is 8.5°.

[0007] Furthermore, the two drive components have the same structure and both include a drive motor, a bearing, a bearing oil seal, a bearing seat, a rotating shaft, a rotating shaft oil seal, a gasket and a propeller blade; a slot for installing the drive motor is opened in the outer shell, and the two drive motors are fixed in the slot of the outer shell, and the rotating shaft is installed at the tail end (rotating shaft end) of the drive motor. The gasket, bearing and bearing oil seal are sequentially sleeved on the rotating shaft, and the bearing seat is used to limit the position and complete the installation of the rotating shaft oil seal. The propeller blade is fixed at the end of the rotating shaft.

[0008] Furthermore, the bearing seat is sleeved on the rotating shaft and fixedly connected to the housing through threads, thereby achieving watertightness and fixing the bearing.

[0009] Furthermore, the propeller blades of the two drive assemblies are on the same horizontal plane.

[0010] Furthermore, when any one of the drive motors 2 drives the propeller blades to rotate, the propeller blades will generate a driving force F1 or F2 that is biased toward the center. The driving force F1 or F2 is decomposed and combined into Ftotal and f1, f2 based on the center line of the propeller, wherein Ftotal is the force that drives the underwater propeller to move forward, and f1 and f2 are the forces that drive the underwater propeller to move sideways, and in the horizontal plane determined by the line connecting the drive motor and the propeller blades, f1 and f2 are perpendicular to the direction of Ftotal.

[0011] Furthermore, when the two drive motors work at the same speed and the same direction, the forces generated by the two propeller blades produce a resultant force at the center line of the propeller, driving the propeller to move in a straight line; in the direction perpendicular to the center line of the propeller, one left and one right force with opposite directions and equal magnitude is generated, and these two forces cancel each other out. If the resultant force of the underwater lateral water flow impact is zero at this time, the propeller will move in a straight line.

[0012] Furthermore, when the water flow is turbulent and there is a left or right water flow impact force in the horizontal plane determined by the line connecting the drive motor and the propeller blades, by changing the differential speed of the two drive motors, a force equal to and opposite to the water flow impact force at this time is generated in the plane, thereby offsetting the interference caused by the water flow impact force to the underwater propeller.

[0013] The present invention has the following beneficial effects:

[0014] The underwater propeller of the present invention can greatly improve the static and dynamic underwater stability of the underwater submersible and has good anti-interference ability. At the same time, its structure is compact and can greatly reduce the size of the underwater submersible. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional diagram of an underwater propeller with oblique symmetrical distribution according to an embodiment of the present invention;

[0016] Figure 2 This is a cross-sectional view of an underwater propeller with oblique symmetrical distribution according to an embodiment of the present invention;

[0017] Figure 3 It is a force analysis diagram of the embodiment of the present invention in motion state;

[0018] In the figure: 1-housing; 2-driving motor; 3-bearing; 4-bearing oil seal; 5-bearing seat; 6-rotating shaft; 7-rotating shaft oil seal; 8-gasket; 9-propeller blade. DETAILED DESCRIPTION

[0019] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0020] like Figure 1-Figure 2 As shown, an obliquely symmetrically distributed underwater propeller of the present invention comprises a housing 1 and a set of drive components obliquely symmetrically installed based on the center line of the housing; the two drive components have the same structure and both comprise a drive motor 2, a bearing 3, a bearing oil seal 4, a bearing seat 5, a rotating shaft 6, a rotating shaft oil seal 7, a gasket 8 and a propeller blade 9; the propeller blades 9 of the two drive components are on the same horizontal plane, such as Figure 3 As shown, when any one of the driving motors 2 drives the propeller blades 9 to rotate, the propeller blades 9 generate a driving force F1 or F2 that is biased toward the center. The driving force F1 or F2 is decomposed and combined into Ftotal and f1 and f2 based on the center line of the propeller, wherein Ftotal is the force that drives the underwater propeller to move forward, and f1 and f2 are the forces that drive the underwater propeller to move sideways, and in the horizontal plane determined by the connecting line of the driving motor and the propeller blades, f1 and f2 are perpendicular to the direction of Ftotal.

[0021] In this embodiment, the two drive components are symmetrically tilted inward based on the center line, and the horizontal deflection angle can be adjusted according to the specific water flow conditions and the performance of the drive system (motor power, speed and other factors). In this embodiment, the horizontal deflection angles of the two drive components are both 8.5°. When the two drive motors 2 work at the same speed and the same direction, the forces generated by the two propeller blades 9 generate a combined force at the center line of the propeller to drive the propeller to move in a straight line; in the direction perpendicular to the center line of the propeller, a left and a right force with opposite directions and the same magnitude is generated, and these two forces cancel each other out. If the underwater lateral water flow impact combined force is zero at this time, the propeller will move in a straight line. When the water flow is turbulent, in the horizontal plane determined by the drive motor 2 and the line connecting the propeller blades 9, there is a water flow impact combined force to the left or right, by changing the differential speed of the two motors, a combined force equal to the water flow impact combined force at this time and opposite in direction can be generated in the plane, offsetting the interference caused by the water flow impact force to the underwater propeller and ensuring the stability of its movement.

[0022] In this embodiment, a slot for installing the drive motor 2 is provided in the housing 1. Two drive motors 2 are fixed in the slot of the housing 1. The shaft end of the drive motor 2 is connected to the shaft 6. The propeller blades 9 are fixed at the end of the shaft 6. The drive motor 2 can drive the shaft 6 to rotate, thereby driving the propeller blades 9 to rotate, so that they generate thrust. The bearing 3, bearing oil seal 4, shaft oil seal 7, and gasket 8 are all mounted on the shaft 6 and limited by the bearing seat 5; specifically, the gasket 8, bearing 3, bearing oil seal 4, and shaft oil seal 7 are mounted on the shaft 6 in sequence, the front end of the gasket 8 is against the rear end of the drive motor 2, and the rear end extends to the bearing 3. The bearing seat 5 is fixed to the housing 1 outside the shaft 6 by threads, which plays the role of watertightness and fixing the bearing 3.

[0023] In this embodiment, the housing 1, as a key structural component of the underwater propeller, needs to have sufficient space to accommodate the drive motor 2, the rotating shaft 6, the propeller blades 9, and related bearings, oil seals and other components, and provide reliable fixed support. At the same time, the housing 1 is provided with interfaces and accessories connected to the submersible cabin to ensure smooth docking and connection with other components on the submersible. The shape of the housing 1 also needs to take into account fluid dynamics factors, so as to reduce resistance during underwater movement and improve the efficiency and stability of the propeller.

[0024] This specific implementation uses two obliquely symmetrically distributed drive components, so that the thrust direction generated is not only in the direction of the central axis of the propeller, but is divided into two combined forces. The different combined forces generated by the two propellers enable the propeller to resist the kinetic energy influence brought by the water flow, thereby ensuring the stability of the propeller underwater.

[0025] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. An obliquely symmetrically distributed underwater propeller, comprising a housing and a set of drive components installed in the housing, characterized in that: The two drive components are installed obliquely symmetrically based on the center line of the housing.

2. The obliquely symmetrically distributed underwater propeller according to claim 1, characterized in that: The two drive components are symmetrically arranged to be tilted inwards based on the center line of the housing, and the horizontal deflection angle is 8.5°.

3. The obliquely symmetrically distributed underwater propeller according to claim 1, characterized in that: The driving assembly includes a driving motor, a bearing, a bearing oil seal, a bearing seat, a rotating shaft, a rotating shaft oil seal, a gasket and a propeller blade; a slot for installing the driving motor is opened in the outer shell, two driving motors are fixed in the slot of the outer shell, and a rotating shaft is installed at the tail end respectively. The gasket, bearing and bearing oil seal are sequentially sleeved on the rotating shaft, and the bearing seat is used to limit the position and complete the installation of the rotating shaft oil seal. The propeller blade is fixed at the end of the rotating shaft.

4. The obliquely symmetrically distributed underwater propeller according to claim 3, characterized in that: The bearing seat is sleeved on the rotating shaft and fixedly connected to the housing through threads.

5. The obliquely symmetrically distributed underwater propeller according to claim 3, characterized in that: The two propeller blades are on the same horizontal plane.

6. The obliquely symmetrically distributed underwater propeller according to claim 3, characterized in that: When any driving motor drives the propeller blades to rotate, the propeller blades will generate a driving force F1 or F2 that is biased toward the center. The driving force F1 or F2 is decomposed and combined into Ftotal and f1 and f2 based on the center line of the propeller, wherein Ftotal is the force that drives the underwater propeller to move forward, and f1 and f2 are the forces that drive the underwater propeller to move sideways, and in the horizontal plane determined by the connecting line of the driving motor and the propeller blades, f1 and f2 are perpendicular to the direction of Ftotal.

7. The obliquely symmetrically distributed underwater propeller according to claim 3, characterized in that: When the two drive motors work at the same speed and direction, the forces generated by the two propeller blades produce a resultant force at the center line of the propeller, driving the propeller to move in a straight line; in the direction perpendicular to the center line of the propeller, one left and one right force of opposite directions and equal magnitude are generated, and these two forces cancel each other out. If the resultant force of the underwater lateral water flow impact is zero at this time, the propeller will move in a straight line.

8. The obliquely symmetrically distributed underwater propeller according to claim 3, characterized in that: When the water flow is turbulent and there is a left or right water flow impact force in the horizontal plane determined by the line connecting the drive motor and the propeller blades, by changing the differential speed of the two drive motors, a force equal to and opposite to the water flow impact force at this time is generated in the plane to offset the interference caused by the water flow impact force to the underwater propeller.

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